F18 Flow meter stationary state monitor B3/4 The program is interrupted and the drain pump is operated. The display shows the message Technical fault code F18 - Call Service Dept. The buzzer is activated for 2 minutes. The water inlet valve is open when it should not be (a signal to open it has not been given by the electronic). Water then flows into the appliance and unexpected pulses from flow meter B3/4 are detected. Unexpected pulses from flow meter B3/4 are also detected when the water inlet valve is not activated.